Press



Nov. 18, 1930. o, EMA N 1,78 2,273

PRESS Filed Sept. 11. 1928 35 ln t e eppende Patentecl Nov. 18, 1930 ior'ro' mmsen n, or WELLINGSBUTTEL; GERMANYfi v PBESS Application fiiedseptember 11, 1928, Serial no; 305324, and ifi German ::mix 22 Thepresent invention relates to an im-' proved poWer -driven press forexpressing uice Or fluid from. compressible substances of vegetable'origin such as are-employed in 'the Production of starch, but the pressmay also be employed to edvantage for expressing oil. from Seeds, nutsand other oleaginous substances 'and for draining peat and the like.

More particularly the invention relates to m presses of that kind Whichconsist of a cylinder in connection with a feed hopper and a perforatedtapered discherge channel at the exit end of the cylinder, the piston orplunger reciprocatin inside the cylinder be- 15 ing drivennbya cranmechanism.

In presses of this kind the piston Or plunger at the termination of theworking stroke of the Crank mechanism is reciprocated i. e. changed inits direction of motion without delay, so that the maximum pressure isexerted only momentarily, the reaction of the substance under treatmenttending to force the piston or plunger back.

. According to the present invention the efficiency of such presses ismaterially increased by meintaining the maximum pressure and evenaumenting said pressure at the termination othe working stroke of theCrank mechenism.

With this end in view the invention c0nsists in the novel combination,arrangement and edeptation of parts., all as more fully hereinafterdescribed, shown in the accompan ingdrawin and then specifically set outclaims.

In the drawings Fig. 1 is a, diagremmatic side elevation partly inVertical section, of the improved press with the Crank mechanism forrecipro- 40 eating the piston or plunger.

Fig. 2 is a partial horizontal section of the piston or plunger of thepress With the tran-k meohanism for reciproceting same in the positionit assuxnes et the termination of the 48 working stroke.

Eig 3 is a partial horizont'el t on o piston Or plunger of the press jwththe "c mechanism for reciprocating'sine inthe pbsitionit assumes atthe moment'iofifehhnging the direction of' motion' of the' fpiston jorplunger When' the completed.

The horizontal or slightlyinclined*Cy1inder a of the press is inconnection With the feed hopper Z and With the perforated taperedworking* stroke of 1sam'ejis discharge Channel 0, which is closedlaitsjfree extremity by means ofnloscillatory suspended lid 0 The piston' orplunger Li reoipfpca i g riside the cylinder a serves for' acfingupo thesubstance supplied to the cylinder by tvey of the feed'hopper b, thepiston or plnnger ;forcibly pushing said substance towards nd into theperforated' tepered' discharge' hannelc.

The pston or plun er dis reciproceted by means of an improve cra'nkmec'hanism. :'In-

stead of a pitman rod linkin the'piston O r plunger positively to thecrarfa-"looseconnection of special construction s provided. The pistonor set of 'push' bars and f spaced'aprt 'disp r d rrs e ne larly inregard to' its' directionjfof mtionje,

tance'in -e'xcess to that of .thestroke offtlie piston or plungerandrigidly connected together 'by means of the stay bolts and' h,;at

or near their extr'emities. It jis z dviseblegto emloy two sets of pushjbars e. fleach .ferming a rigid frame in' symmetricalfi arrangement atboth sides of thelon'gitudin'al axis of the piston or Fig.2. n

v The space enclosed. betwee' i the' push bars e and f and their staybolts' n d sres for .accommodating the Crank-'she versely in regal-d tothe 'cylinde the shaft z' in'symmetricalflrr tw'o 'Crank arms j, eachroiid roller IC at its e'xtremity a p against the push bars e, e and [JI pIunger-;es.'indicatednin v tion the piston Or plunger d retains itsposition when the cylinder a is charged from the hopper b; at thetermination of its working stroke, however, the piston or plunger doesnot retain its position owing to the reaction of the substance underpressure tending to force the piston back. This is disadvantageousbecause it decreases the working effect of the press.

To Obtain the highest working effect of the press by maintaining themaximum pressure and even augmenting said pressure of the piston at thetermination of the working stroke of the Crank mechanism, a cam l isfixed to the piston d between the push bars e, said cam being formedwith a circular race for an auxiliary roller m which is carried by thesecondary Crank arms n, as shown in Fig; 3.

he circular race of the cam Z is fixed ecce'ntric in regard to the Crankshaft i and the 'roller m follows the rollers k at such a distance thatit starts acting when the rollers k lFrave completed their action, asindicated in When the Crank shaft Z' continues its rotation in thedirection of the arrow, the roller m acts against the circular race ofthe Cam Z. Owing to the eccentricity of the circular race the cam l andwith it the piston or plunger d are pushed forward some distanceindicated in Fig. 1 by the dotted line parallel in regard to thecircular race of the cam. This su'pplementary actuation of the piston Orplunger obtains and maintains the maximum Pressure until the moment thepiston or plunger starts its return journey for recharging the cylindera.

lt must be observed here, that the reduction in Volume of the substanceunder pressure due-"to the expression of the liquid therefrom naturallydiminishes the action of the press if the piston or pluuger is only heldstationary in the position it a-ssumes at the termination of the workingstroke of the Crank mechanism.

.The return journey of the piston or plunger (Z for recharging thecylinder a is started when the roller m has completed its travel alongthe circular race of the cam l. In Fig.

'1 the dotted circles m indicate the relative positions of the; rollersk and m, at the moment when the roller m is about to disengage from thecam Z and when the rollers k are about to contact with the push bars f.ln

Guide rails 0 on the bed plate p of the press l are engaged by the feetof the push bars e and f so as to rectilineally guide the latter intheir to and fro motion.

The liquid expressed from the substance charged into the cylinder aescapes through the perforations in the circumferential wall of thedischarge channel c and through the perforations in the head of thehollow pisto'n or plunger d, arrows indicating in Fig. 1 the course ofthe liquid through the hollow piston or plunger and along inclinedgutters q, 7' below the cylinder a which receive the liquid from thelatter at the rear end of same. The gutter q moves to and fro withthe-piston or plunger d, being attached thereto; the gutter T is fixedin the base 8 of the press below the gutter q. The liquid is dischargedfrom'the gutter 7' into a receiver t which is in connection with theperforated discharge channel 0 of the cylinder a as shown in Fig. 1, aconduit u leadin the liquid from the receiver t to its place o des-'tination.

The compressed substance after leaving the cylinder a: reaches theperforated discharge channel a collecting therein and filling same untilit opens the lid 0 and finds its way Out.

While I have shown in the accompanying drawing the preferred form of myinvention, it will be understood 'that I do not limit myself to theprecise form shown, for many of the details may be changed in form Orposition without afi'ecting the operativeness or utility of myinvention, and I therefore reserve the right to make all suchmodifications as are included within the scope of the following claims,Or of mechanical equivalents to the structure set forth.

What I do claim as my invention and desire to secure by Letters *Patentis:

1. An apparatus for expressing juice Or fluid from compressiblesubstances, comprising a cylinder, a feed hopper communicating with saidcylinder, a perforated, tapered discharge channel at one end of thecylinfi der, a piston in said cylinder, an open frame carried by thepiston outside the cylinder, a rigidly supported shaft passing throughthe Opening in said frame, a Crank on said shaft co-operating with theframe members"- for reciprocating the piston within the cylnder, a camelement carried by said rame between the shaft and the piston, and anadv ditional Crank on the shaft adapted to engage said cam element so asto support the pisten against the reaction of the compressed materialsafter the first Crank has passed its dead centre position.

2. A structure as claimed in claim 1 wherein the cam element is adaptedto remain in engagement With the additional Crank until the first Cranks ready to retract the piston, said cam element'bein eccentric relativeto the shaft and adapte to effect a gradual advence of the piston.

In witness whereof I have hereunto Signed my name this 28th da of August1928.

TTO RIEMANN.

